Wiring the interlock
The Model 2461 is provided with an interlock circuit that must be
positively activated in order for the high-voltage output to be
enabled. The interlock helps facilitate safe operation of the
equipment in a test system. Bypassing the interlock could
expose the operator to hazardous voltages that could result in
personal injury or death.
To perform high-voltage measurements, the Model 2461 interlock
must be connected to an interlock switch. When properly connected,
the safety interlock of the Model 2461 places the outputs of the
instrument in a safe state. When the safety interlock signal is asserted,
all voltage ranges of the instrument are available and the green
front-panel INTERLOCK indicator is on.
When the safety interlock signal is not asserted, the high-voltage
ranges are disabled, limiting the nominal output to less than ±42 V,
and the front-panel INTERLOCK indicator is not illuminated.
You can only use the high-voltage outputs when the interlock is
asserted. If you try to assign a high-voltage output and turn the
source on when the interlock is not asserted, you see event
code 5074, “Output voltage limited by interlock.” Note that the
SOURCE swipe screen displays the value that was selected for the
voltage source, but the source value is limited to less than ±42 V.
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